At the low end of the 5.3 spectrum, the LM7's 25 lb fuel injectors are going to max out before they reach the 400 horsepower stage, typically around the 380 horse mark. Gen IV injectors, particularly those on flex fuel models, are at or just above the 30 lb mark, which will bring you closer to 400 horses.
Full Answer
How many injectors do I need for my gas engine?
The chart below lists some general guidelines for gasoline engines (with 8 injectors): *Horsepower is measured at the crankshaft. Why is it important? Choosing an injector that is too small will:
What happens if you put higher capacity fuel injectors in a car?
Installing higher capacity injectors means you'll need to retune your ECU accordingly, but if you've installed a more aggressive camshaft you're likely already looking at a reflash. Don't worry about the fuel pump on a Gen IV—you're good to nearly 500 horses with the stock unit.
How do fuel injectors work at WOT?
The right size injector can supply enough fuel under full load conditions at an 80% duty cycle. This lets the injector close 20% of the time at WOT which keeps it from overheating.
What does a 20% fuel injector flow rate mean?
This lets the injector close 20% of the time at WOT which keeps it from overheating. An injector this size can also provide an accurate amount of fuel at low rpm. To calculate your required flow rate, use this formula:
How much power will stock 5.3 injectors handle?
At the low end of the 5.3 spectrum, the LM7's 25 lb fuel injectors are going to max out before they reach the 400 horsepower stage, typically around the 380 horse mark. Gen IV injectors, particularly those on flex fuel models, are at or just above the 30 lb mark, which will bring you closer to 400 horses.
How much HP can my injectors handle?
Flow Rate Definition, Calculating Horsepower RangeInjector Flow RateNaturally Aspirated EngineEngine w/ Power Adder24 lbs./hr.280-360 hp240-300 hp30 lbs./hr.350-450 hp300-375 hp36 lbs./hr.425-540 hp350-450 hp42 lbs./hr.500-625 hp410-525 hp4 more rows•May 27, 2017
How much HP will 120lb injectors support?
1900 horsepowerRated injector flow: 120 lb/hr @ 43 PSI. Supports up to 1900 horsepower.
How much HP can performance fuel injectors add?
10-20 moreLarger throttle body and injectors A larger high-performance throttle body will deliver more horsepower. Depending on what type of engine you have, you can gain as much as 10-20 more horsepower and comparable torque.
Can you have too big of injectors?
Bigger is not always better It's easy to fall into the trap of thinking that bigger fuel injectors equal more power, but unless your engine is set up to deal with the extra fuel, you'll be on a fast track to trouble. The excess fuel will flood the engine and it either won't run at all, or will be running too rich.
What pound injectors do I need?
1:441:24:38INJECTOR MATH-HOW TO CHOOSE THE RIGHT SIZE - YouTubeYouTubeStart of suggested clipEnd of suggested clipBut basically a good idea a good estimation is that you need a half a pound of fuel per hour to makeMoreBut basically a good idea a good estimation is that you need a half a pound of fuel per hour to make one horsepower as we all know. And if you don't know you should that injectors are rated their flow
What CC are 80lb injectors?
Fuel Injectors | Siemens Deka | 80 lb/hr | 875 cc/min | High Impedance | EV1 | 8 Cyl.
How much HP can 550cc injectors handle?
550 cc injectors will support about 500 bhp and maybe a bit more if you tweak the fuel pressure.
Which is better high or low impedance injectors?
That low-amp current keeps the injector temperature lower, which makes it more reliable; that's why the high-impedance design is the most common injector style for OEM applications. Low-impedance injectors, also called peak-and-hold injectors, are sent a more powerful electrical signal, usually around 56 amps, to open.
Does direct injection increase HP?
The technical answer is yes; fuel injectors can add 10 extra horsepower at peak.
Will bigger injectors hurt mpg?
In the end, do not upgrade to larger injectors in an attempt to get better fuel mileage, as new stock sized injectors will do the job if your current injectors are worn out. But at the same time, if you are looking for more power, do not be afraid to go to a larger injector because of losing fuel economy.
Is it worth it to upgrade fuel injectors?
But once the engine begins to process an increased amount of air (either by adding boost or NOS or grossly changing the engine's displacement), the fuel injectors won't be able to flow enough fuel to keep the engine from running lean. This is when one should consider upgrading their fuel delivery system.